
str1 = "254"
str2 = "785"
print("菜鸡！！！")
print("菜鸡！！！",str1,str2)

str_1 = "abc wda aad abc ghi"
str_2 = str_1.replace("abc","123")
print(str_2)

str_3 = "   qqwfsoi1s54fssfesef   "
print(str_3.strip())
print(str_3.strip("q"))
str_4 = "qqqwfsoi1s54fssfesefff"
print(str_4)
print(str_4.strip("q"))

str_8 = "wgfsfesfesq____AFDSadcasFDAGA"
print(str_8.upper())
print(str_8.lower())

str_4= "essegsogsegsg草你满FSE"
print(str_4.isalnum())
str_5 = "746841685//"
print(str_5.isalnum())
